Hubei Automotive Industries Institute

Shiyan, China

Hubei Automotive Industries Institute

Shiyan, China
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Bao W.,Hubei Automotive Industries Institute
Applied Mechanics and Materials | Year: 2014

The torsion fatigue life test which aimed at the automotive steering shaft designs the test bed of micro-controller based on PIC16F877 and makes the accurate test methods possible. The installation of a torque sensor in series with the magnetic particle brake can detect feedback on the test load. A serial port communication between micro-controller and programmable power supply can automatically adjust the output of current size of programmable power supply, and make torsional load output by the magnetic particle brake constant. The system is not only accurate in statistics testing and capable of memorizing the number of tests but also low cost and of practical value. © (2014) Trans Tech Publications, Switzerland.


According to the teaching experience coming from the Application-oriented Higher Education, the article r analysed the question to the course of the Automobile Marketing practice and proposed the countermeasure to improve the teaching results such as teaching scene, set up the second classroom as well as strengthen the drill simulation during the teaching. © (2012) Trans Tech Publications.


Wu Y.,Hubei Automotive Industries Institute
Advanced Materials Research | Year: 2012

For being convenient for researching the dynamic characteristic and the improvement and use of RRR-PRP planar six bar mechanism, for improving the dynamic technical performance, the three-dimensional solid model of the mechanism was established with ADAMS. Each part of the model in ADAMS was set up. Simulation analysis on the working process of the mechanism was achieved. The structure optimization parameters of the mechanism were obtained. The result proves that the vertical locations of two end points of rocker are almost no impact on the vertical velocity of slider. The location of block and the horizontal locations of two end points of crank and rocker have less impact on the vertical velocity and acceleration of slider. The vertical locations of two end points of crank have greater impact on the maximum vertical velocity and acceleration of slider. © (2012) Trans Tech Publications.


Zhao G.H.,Hubei Automotive Industries Institute
Applied Mechanics and Materials | Year: 2014

In allusion to the system that there is but only severe time-varying and non-flexible coupling between the two hydraulic channels, the daul-cylinder hydraulic synchronous movement servo control system is designed for large die casting equipment, and its control model is establish. By guiding thought of self learning control strategy, two levels of speed control scheme is adopted in the hydraulic system, namely the level adjustment and secondary servo compensation adjustment. On the basis, adaptive learning control scheme is established. Thus, its control strategy algorithm of incremental form is presented. Finally, through MATLAB(R2010a), the simulation analysis has been carried on to the system, the emulational results show that the control scheme can make the system to achieve excellent performances of synchronous movement. © (2014) Trans Tech Publications, Switzerland.


Zhao G.H.,Hubei Automotive Industries Institute
Applied Mechanics and Materials | Year: 2014

In large continuous rolling process, that the roller can be accurately control have an important impact on production. In allusion to the characteristics of variable and nonlinear of hydraulic servo system parameters for controlling roller position, fuzzy PI control and adjusting the parameters in on-line are used, in order to realize the three cylinder synchronous control. The research results indicate: for system with external force disturbance, the fuzzy adaptive control has a strong anti-interference ability, and improve the robustness of the control system of multi-cylinder synchronization, as a result, to obtain the satisfactory control effect. To be carried out simulation with Matlab, the results show that the fuzzy PI control scheme is a high precision, efficient and feasible method, and can obtain the satisfactory results. © (2014) Trans Tech Publications, Switzerland.


Wu Y.,Hubei Automotive Industries Institute
Applied Mechanics and Materials | Year: 2012

For being convenient for researching the dynamic characteristic and the improvement and use of small shaper, for improving the dynamic technical performance, the three-dimensional solid model of working mechanism was established with ADAMS. Each part of the model in ADAMS was set up. Simulation analysis on the working process of working mechanism was achieved. The structure optimization parameters of working mechanism were obtained. The result proves that the lengths of crank and rocker are almost no impact on the fluctuation range of ram speed. The location of revolute joint between rocker and frame has less impact on the return speed and acceleration of ram. The location of revolute joint between crank and slider impacts greater on the fluctuation range of ram speed.


Zhao G.H.,Hubei Automotive Industries Institute
Advanced Materials Research | Year: 2014

To the pusher and variable load synchronous motion of hydraulic dual-cylinder system, the "Bang-Bang" control mechanism and the non-continuous control technology are adopted. The hydraulic system that used the ordinary realizes a synchronization error less than two percent. The stability and reliability of the system are improved and the cost of the system is reduced. Especially in the pusher and other industrial areas, the hydraulic system is more suitable for engineering application. By the ability of computers' "software servo control", the output of the application system can meet the performance standard and make complex mechanical control. it proves that a non-continuous control method is an effective way to carry out the digital control. © (2014) Trans Tech Publications, Switzerland.


Wang B.H.,Hubei Automotive Industries Institute | Luo Y.G.,Hubei Automotive Industries Institute
International Journal of Automotive Technology | Year: 2011

This paper first describes the control strategy used in a hybrid electric public bus and then proposes a torque-balancing control strategy. Simulations were performed using the designed control strategies, and the results were analyzed under different conditions. The torque-balancing control strategy was improved on the basis of the efficiency-first ideas of the hybrid system. Finally, experiments were performed to verify that the efficiency-first and torque-balancing control strategy (EFCS) is both feasible and reliable. The simulation results showed that, compared with a conventional public bus, the hybrid electric bus could save approximately 27.3 percent on fuel consumption using the EFCS control strategy in a public bus in China, while under the Wuhan urban driving cycle. © 2011 The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg.


Laref A.,Hubei Automotive Industries Institute | Luo S.J.,Hubei Automotive Industries Institute
Journal of the Physical Society of Japan | Year: 2010

We present a theoretical study of the spin state of LaCoO3 using local density approximation + Hubbard U (LDA+U) approach based on pseudopotential method. The correlation e.ects play a signi.cant role in the case of low spin (LS), intermediate spin (IS) and high spin (HS) con.gurations. The ground state is found to be a nonmagnetic insulator with Co ions in a LS state. Somewhat higher in energy, we.nd an IS state followed by a HS state at signi.cantly higher energy. The orbital ordering in IS state driven by the Jahn-Teller (JT) and on-site Coulomb interactions is demonstrated based on the LDA+U electronic structures. The phonon dispersion curve of the paramagnetic LS ground state at high symmetry directions of the Brillouin zone (BZ) and phonon density of states are also calculated. The frequencies of the Raman and IR modes are calculated and the main characteristics of these modes are discussed. The computed zone center phonon frequencies of LS state agree fairly well with the experimental results. © 2010 The Physical Society of Japan.


Wang B.H.,Hubei Automotive Industries Institute | Jin Y.,Hubei Automotive Industries Institute | Luo Y.G.,Hubei Automotive Industries Institute
International Journal of Automotive Technology | Year: 2010

Parametric optimization is an important step for any mechanical system design, including the development and design of a hybrid electric bus. To obtain an optimized parameter grouping of the EQ6110HEV hybrid electric bus for best fuel economy, an orthogonal experiment design method is applied to the parameter optimization process of the EQ6110HEV hybrid prolusion system. This paper proposes two orthogonal experiment methods; the basically orthogonal experiment method and the synthetically orthogonal experiment method. By this means, the development time and the testing costs are reduced, and the impact of factors and their optimal levels are obtained by a range analysis of the experiment results. The results show that the fuel economy of the optimized parameter grouping is improved by 4.1 percent for the four-stage urban driving cycle in China and by 8.7 percent for the Wuhan urban driving cycle of public buses in China, in comparison with that of the parameter grouping of the current configuration. © 2010 The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg.

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